Date：Middle of July to Middle of October(Ninth to Twelfth Month Of The Dai Calendar)
The Door-Closing and Door-Opening Festivals are the three longest and grandest periods. The Door-Closing Festivals is the beginning of working season which means everyone should work hard in next three months, marriage is not allow in this period. Door-Opening Festivals is the end of raining season which means everyone will enjoy in the real festival.People worship Buddha by sacrificing food, flowers, sutra, clothes and other wealth. They also take advantage of the holidays to preach Buddhist teachings.The most important thing is marriage is allow in this period.